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Reorganization and Fresh Start Accounting Pro-Forma Adjustments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Estimated reorganization value	$ 28,496,726
Total liabilities	28,088,686
Noncontrolling interests	223,040
Estimated equity value attributable to stockholders	$ 185,000

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Amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 55

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6585303&loc=d3e56239-112766



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-Name Statement of Position (SOP)

-Number 90-7

-Paragraph 37, 38, 68

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Reorganization Value

-URI http://asc.fasb.org/extlink&oid=6523519



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-Publisher FASB

-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-SubTopic 10

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